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Anisotropy of growth kinetics of He-3 crystals below 1 mK.

Research output: Contribution to journalJournal article

Published

  • Viktor Tsepelin
  • Harry Alles
  • A. Babkin
  • Reyer Jochemsen
  • Alexander Y. Parshin
  • Igor A. Todoshchenko
Journal publication date01/2002
JournalPhysical Review Letters
Journal number4
Volume88
Pages045302
Original languageEnglish

Abstract

The growth anisotropy of different facets has been measured in He-3 crystals at 0.55 mK using a low-temperature Fabry-Perot interferometer and high-resolution pressure measurements. The observed linear dependence of the growth velocity on the driving force shows that facets grow due to the presence of dislocations. The values of the obtained step energies suggest that He-3 has stronger coupling of the liquid-solid interface to the lattice than has been expected. The dependence of the step energy versus the step height is consistent with a quartic power law pointing out that the step-step interactions are of elastic origin.